mirror of
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92 lines
4.1 KiB
JSON
92 lines
4.1 KiB
JSON
{
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"CVE_data_meta": {
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"ASSIGNER": "cve@mitre.org",
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"ID": "CVE-2020-25603",
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"STATE": "PUBLIC"
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"product": {
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"product_data": [
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{
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"product_name": "n/a",
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"version": {
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"version_data": [
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{
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"version_value": "n/a"
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}
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]
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}
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}
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]
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},
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"vendor_name": "n/a"
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}
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]
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}
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},
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"data_format": "MITRE",
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"data_type": "CVE",
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"data_version": "4.0",
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "An issue was discovered in Xen through 4.14.x. There are missing memory barriers when accessing/allocating an event channel. Event channels control structures can be accessed lockless as long as the port is considered to be valid. Such a sequence is missing an appropriate memory barrier (e.g., smp_*mb()) to prevent both the compiler and CPU from re-ordering access. A malicious guest may be able to cause a hypervisor crash resulting in a Denial of Service (DoS). Information leak and privilege escalation cannot be excluded. Systems running all versions of Xen are affected. Whether a system is vulnerable will depend on the CPU and compiler used to build Xen. For all systems, the presence and the scope of the vulnerability depend on the precise re-ordering performed by the compiler used to build Xen. We have not been able to survey compilers; consequently we cannot say which compiler(s) might produce vulnerable code (with which code generation options). GCC documentation clearly suggests that re-ordering is possible. Arm systems will also be vulnerable if the CPU is able to re-order memory access. Please consult your CPU vendor. x86 systems are only vulnerable if a compiler performs re-ordering."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"references": {
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"reference_data": [
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{
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"url": "https://xenbits.xen.org/xsa/advisory-340.html",
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"refsource": "MISC",
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"name": "https://xenbits.xen.org/xsa/advisory-340.html"
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},
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{
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"refsource": "FEDORA",
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"name": "FEDORA-2020-306b84fd07",
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4JRXMKEMQRQYWYEPHVBIWUEAVQ3LU4FN/"
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},
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{
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"refsource": "FEDORA",
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"name": "FEDORA-2020-f668e579be",
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DA633Y3G5KX7MKRN4PFEGM3IVTJMBEOM/"
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},
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{
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"refsource": "DEBIAN",
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"name": "DSA-4769",
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"url": "https://www.debian.org/security/2020/dsa-4769"
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},
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{
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"refsource": "SUSE",
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"name": "openSUSE-SU-2020:1608",
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"url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00008.html"
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},
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{
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"refsource": "FEDORA",
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"name": "FEDORA-2020-d46fe34349",
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RJZERRBJN6E6STDCHT4JHP4MI6TKBCJE/"
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},
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{
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"refsource": "GENTOO",
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"name": "GLSA-202011-06",
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"url": "https://security.gentoo.org/glsa/202011-06"
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}
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]
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}
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} |